i5 2500k is good cpu and when Oced at speed like 5 Ghz it will be easily ahead of PII X6 but OP's budget is 19k with which he have to buy a Mobo+CPU+Ram and decent PSU and core i5 2500k alone costs 11.5k now and a decent mobo+cpu cooler will cost him another 11-12k. So for Ops budget getting PII X6 makes more sense 